Effect of magnetic field annealing on the soft magnetic properties of nanocrystalline materials

• Published in: Journal of magnetism and magnetic materials Vol. 316; no. 2; pp. 458 - 461
• Main Authors: Ito, N., Michels, A., Kohlbrecher, J., Garitaonandia, J.S., Suzuki, K., Cashion, J.D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2007; Elsevier Science
• Subjects: Anisotropy—induced; Anisotropy—random; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Exchange interaction; Magnetic properties and materials; Magnetic properties of nanostructures; Melt-spun alloy; Physics; Small-angle neutron scattering; 75.60.Nt; Small-angle neutron scattering; Anisotropy—random; Exchange interaction; 75.50.Tt; 75.25.+z; Anisotropy—induced; Melt-spun alloy; 75.30.Gw; Magnetization; Magnetic annealing; Melt-spun alloy; Small-angle neutron scattering; Anisotropy-random; Anisotropy-induced; Exchange interaction; Magnetic field effects; Melt spinning; Iron alloys; Soft magnetic materials; 75.25.+z; 75.30.Gw; 75.50.Tt; 75.60.Nt; Rotating field; Small angle neutron scattering; Field orientation; Magnetic anisotropy; Exchange interactions; Nanocrystal; Transition element alloys; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2007.03.121

The effects of static- and rotating-magnetic-field annealing on the magnetic softness and the magnetization alignments in nanocrystalline Fe 84Nb 6B 10 have been investigated by means of DC magnetometry and small-angle neutron scattering (SANS). At the remanent state, the SANS pattern obtained from the static-field annealed sample exhibited an enhanced SANS signal in the direction normal to the uniaxial anisotropy ( K u) field direction, indicating a well-developed long-range magnetization alignment along the direction of K u. Contrarily, the SANS pattern for the rotating-field annealed sample is virtually isotropic at zero field, reflecting the lack of anisotropic magnetization alignments. The soft magnetic properties of nanocrystalline Fe 84Nb 6B 10 are improved dramatically by rotating-field annealing due to the suppression of K u.